webrtc view in swiftui in swift

To display a WebRTC video stream in SwiftUI, you can use the AVFoundation framework to capture the WebRTC video and then use a SwiftUI View to display it. Here is an example implementation:


main.swift
import SwiftUI
import AVFoundation

class WebRTCViewModel: NSObject, ObservableObject {

    let rtcClient = RTCClient()

    @Published var rtcVideoTrack: RTCVideoTrack?

    override init() {
        super.init()

        rtcClient.delegate = self
        rtcClient.startCapture()
    }
}

extension WebRTCViewModel: RTCClientDelegate {

    func rtcClient(_ rtcClient: RTCClient, didReceiveVideoTrack videoTrack: RTCVideoTrack) {
        DispatchQueue.main.async {
            self.rtcVideoTrack = videoTrack
        }
    }
}

struct WebRTCView: UIViewRepresentable {

    @ObservedObject var viewModel: WebRTCViewModel

    func makeUIView(context: Context) -> RTCVideoRenderer {

        let videoView = RTCVideoRenderer(frame: .zero)
        videoView.contentMode = .scaleAspectFit
        viewModel.rtcVideoTrack?.add(videoView)
        return videoView
    }

    func updateUIView(_ uiView: RTCVideoRenderer, context: Context) {
        // Update track if it has changed
        viewModel.rtcVideoTrack?.add(uiView)
    }
}
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In the WebRTCViewModel we create an instance of RTCClient to capture the WebRTC video stream. We also expose the rtcVideoTrack property through a @Published annotation so that the SwiftUI View can update when the video stream is received.

In the WebRTCView we create a UIViewRepresentable View that wraps the RTCVideoRenderer. makeUIView is called once when the View is created and updateUIView is called each time a change is made to the View. We pass the WebRTCViewModel to the View using @ObservedObject to enable the View to receive updates from the ViewModel.

To display the WebRTCView in our SwiftUI layout, we can add it to our View hierarchy like this:


main.swift
struct ContentView: View {

    @StateObject var webRTCViewModel = WebRTCViewModel()

    var body: some View {

        VStack {
            WebRTCView(viewModel: webRTCViewModel)
        }
    }
}
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This should display the live video stream in your SwiftUI app.

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